<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on: loginWay}" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on: !loginWay}" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login" >
          <div :class="{on: loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号"  v-model="phone">
              <button
                :disabled="!rightPhone"
                class="get_verification"
                :class="{right_phone: rightPhone}"
                @click.prevent="getCode()"
              >
                {{codeTime ? `已发送(${codeTime}s)` : '发送验证码'}}
              </button>
            </section>
            <section class="login_verification">
              <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div :class="{on: !loginWay}">
            <section>
              <section class="login_message">
                <input type="tel" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
              </section>
              <section class="login_verification">
                <input type="password" maxlength="8" placeholder="密码" v-if="!isShowPwd" v-model="pwd">
                <input type="text" maxlength="8" placeholder="密码" v-else v-model="pwd">
                <div class="switch_button" :class="isShowPwd ? 'on' : 'off'" @click="isShowPwd=!isShowPwd">
                  <div class="switch_circle" :class="{right: isShowPwd}"></div>
                  <span class="switch_text">{{isShowPwd ? 'abc' : '...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                <img class="get_verification" ref="captcha" src="http://localhost:4000/captcha" alt="captcha" @click="getCaptcha">
              </section>
            </section>
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:;" class="go_back" @click="goBack">
        <i class="iconfont icon-jiantou2"></i>
      </a>
    </div>
    <AlertTip :alert-text="alertText" v-show="showAlert" @closeTip="closeTip"></AlertTip>
  </section>
</template>

<script>
  import AlertTip from '../../components/AlertTip/AlertTip'
  import {reqSendCode, reqSmsLogin, reqLogin} from '../../api'
  export default {
    name: '',
    data () {
      return {
        loginWay: true, // true短信登陆， false代表密码登陆
        phone: '', //手机号码
        code: '', //短信验证码
        codeTime: 0, // 计时的时间
        isShowPwd: false, // 是否显示密码
        pwd: '', //密码字符串
        name: '', // 用户名
        captcha: '', // 图形验证码
        alertText: '', // 提示文本
        showAlert: false, // 是否显示提示框
      }
    },
    components: {
      AlertTip
    },
    computed: {
      rightPhone () {
        return /^1\d{10}$/.test(this.phone);
      }
    },
    mounted () {
      this.getCaptcha();
    },
    methods: {
      // 异步获取短信验证码
      async getCode () {
        //如果当前没有计时
        if (!this.codeTime) {
          // 启动倒计时
          this.codeTime = 30;
          this.intervalId = setInterval(() => {
            this.codeTime--;
            if (this.codeTime <= 0) {
              clearInterval(this.intervalId);
            }
          }, 1000);
          // 发送ajax请求（向指定手机号码发送验证码短信）
          const result = await reqSendCode(this.phone);
          if (result.code === 1) {
            // 显示提示
            this.showAlerts(result.msg);
            //停止倒计时
            if (this.codeTime) {
              this.codeTime = 0;
              clearInterval(this.intervalId);
              this.intervalId = 0;
            }
          }
        }
      },
      // 异步登陆
      async login () {
        let result;
        // 前台表单验证
        if (this.loginWay) { // 短信登陆
          const {rightPhone, phone, code} = this;
          if (!this.rightPhone) {
            // 手机号码不正确
            this.showAlerts('手机号码不正确');
            return false
          } else if (!/^\d{6}$/.test(code)) {
          // 验证码必须是六位数字
            this.showAlerts('请输入正确的验证码');
            return false
          }
          // 发送ajax请求短信登陆
          result = await reqSmsLogin(phone, code);
        } else { // 密码登陆
          const {name, pwd, captcha} = this;
          if (!this.name) {
            // 用户名必须指定
            this.showAlerts('用户名必须指定');
            return false
          } else if (!this.pwd) {
            // 密码必须指定
            this.showAlerts('密码必须指定');
            return false
          } else if (!this.captcha) {
            // 验证码必须指定
            this.showAlerts('验证码必须指定');
            return false
          }
          // 发送ajax请求短信登陆
          result = await reqLogin({name, pwd, captcha});
        }
        //停止倒计时
        if (this.codeTime) {
          this.codeTime = 0;
          clearInterval(this.intervalId);
          this.intervalId = 0;
        }
        // 根据结果处理数据
        if (result.code === 0) {
          const user = result.data;
          // 将user保存到vuex的state
          this.$store.dispatch('recordUser', user);
          // 去个人中心界面
          this.$router.replace('/profile');
        } else {
          // 显示新的图片验证码
          this.getCaptcha();
          // 显示警告提示
          const msg = result.msg;
          this.showAlerts(msg);
        }
      },
      showAlerts (alertText) {
        this.showAlert = true;
        this.alertText = alertText;
      },
      closeTip () {
        this.showAlert = false;
        this.alertText = '';
      },
      // 点击切换图片验证码
      getCaptcha () {
        this.$refs.captcha.src = 'http://localhost:4000/captcha?time=' + Date.now();
      },
      goBack () {
        this.$router.replace('/msite');
      }
    }
  }
</script>

<style scoped lang='stylus' ref='stylesheet/stylus'>
  @import '../../common/stylus/mixins.styl'
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #66ccff
          text-align center
        .login_header_title
          padding-top 40px
          text-align center
          >a
            display inline-block
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin-right 40px
            &.on
              color #66ccff
              font-weight 700
              border-bottom 2px solid #66ccff
      .login_content
        >form
          >div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid #66ccff
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.right_phone
                  color  #000
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s,border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background #66ccff
                >.switch_circle
                  //transform translateX(27px)
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                  transition transform .3s
                  &.right
                    transform translateX(30px)
            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              >a
                color #02a774
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #66ccff
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        >.iconfont
          font-size 20px
          color #999
</style>
